Adhesive fabric.



P. J. GLEASON.

ADHESIVE FABRIC. APPLIOATIOI FILED snr'r. 1, 1910.

997, 125. Patented ly 4, 1911.

W65. Jnvma'n; I v Glee-grow 665.31%.

" which the pigmentis stirred in. "This mix- T-ES -.P T NT CE-i I rmnnrcx .f. eraason'yor wairoLn-imssaenusnrrs, assr'enoa ro 'whLPOLE'-. unner. comm, or warmers; massacnusarrs, A Qt)BP( );R.elTIO.1\T. Qlv =MAINE,

ADHESIVE: FABRIC.

Specification of Letters intent. Paite Application fled September'1, .1910. Serial No. 580,067.

nted July 4, 1 91 1.

certain new. and useful Improvements 'in Adhesive Fabrics, of which the following is a specification.

This invention has relation to adhesive fabrics such as are employed in reinforcing a base of leather, leatherboard, compositionor the like in the manufacture of inner soles.

' The object of the invention is to provide a fabricof the character referredto having an adherent-layer which, by the application of heat, may be caused to adhere properly to the materials referred to without'being so softened as to sink into the: fabric; To this end, I.-utilize. we base, canvas, or other suitable fabric, and apply thereto an inner layer relatively lower melting point, which can be of high melting point adhesive material, and an outer layer of adhesive material of a softened and rendered tacky by the application .-of heat without affecting the inner layer. By thus: employing two layers as described-,1 am able to secure a stronger union between the fabric and the leather than has heretofore been possible.

On the accompanying drawing, .1 have illustrated conventionally an. adhesive fab cordance with my process.

s t The base 1 consists, as. previously stated, '35 of cloth of any desired kind such, for inmaterial-consists preferably of the follow ing ingredients, to wit: 20 parts (by weight) of-gutta percha; and '20 parts of a pigment such as -whiting, talc, or zinc oxid or their equivalents;- two parts of a suitable pitch, tar or bitumen which will not injure gutta percha, such for instance as soft asphaltum, soft stearin pitch, pine tar, or Stockhohn' tar (preferably pine tar or Stockholm'tar).. The gutta-percha and the tar are melted and thoroughly mixed, after tune, on account of the presence of the'pigment, has a point (i. e. atwhich it softens soasto p) of approximately 380" F...v

- pine tar or Stockholm tar, melted and thoroughly commingled, and having a melting point (2'. e. at which the mixture softens so as a to drop) of approximately 238 F. As previously stated, the outer layer'con'sists of one "or more coats, preferably three, sufiicient .ti'me ela'psing between the application of the several coats to permit the preceding coat to set or partially set. The quantity in weight of material employed in .the' two layers is substantially the same, although the outer layer consists of three coats, owing to the fact that the specific gravity of the material of the inner layer is considerably greater than that of the outer layer. For instance,

for a piece of cloth approximately 30 by 36 inches,".the outer layer aveighs about 24,, to 25} ounces, and 'the inner, layer weighs. about 2?; ounces. w a

For guidancein carrying out the process,

hours to elapse after applying the inner layer before" the outer layer is applied, and

that approximately 3 or i hours should elapse between the suceessivecoatings of the outer layer.- Sometimes I find it desirable to add to the mixture of the inner layer while hot about 1 gallon of naphtha (7 2 Baumhand to the mixture of the second layer about gallon of said naphtha. The naphthais heated and mixed while hot with said mixtures.

.The fabric, made in accordance with the foregoing process, may be heated by a steamheated plate, so as to soften the outer layer and make it tacky, .without causing'the softening of the inner layer. Thus there is '.no

-I may state that I preferably permit 12 necessity of using steam or hot water for the purpose of rendering it flexible and pliable, and softening the facing, as fabric made'in accordance withmyinvention retains its flexibilityafter thelayers are applied thereto.' The inner layer does not penetrate thejcloth'to any extent, and yet at the same: time adheres -most tenaciously thereto, and-the softeningof the outer layer permits a union between the cloth and the leather 'of great strength, while at the'same time said outer layer is sufliciently hard so addition of the pigment. By increasing or that it is normally not and may be handled and shipped without'theconvolutions sticking-together:

' It' will be understood that the exact proportions of the ingredients herein ,named may be changed in accordance with particular requirements. It will be notedtliat in the two layers, the gutta'perchaand the softening material, to-wit, tar, pitch or bitu-' ing and using the same, although withoutattempting to set forth all of the forms in which it may bemade or all of the modes of its use, what I claim is: I

1. An adhesive fabric, consisting of a cloth, an inner adhesive layer having a relatively high melting point, and an outer normally nonstacky adhesive layer having a I relatively low melting point.

2. An adhesive fabric, consisting ofa cloth, an inner adhesive layer having a relatively high melting point, and an outer normally non-tacky adhesive layer having a relatively low meltingpoint, each of said layers comprising gutta percha, and the inner layer also comprising a pigment.

3. An adhesive fabric, consisting of a cloth, an inneradhesive layer having a rela-- tively high melting point, and an outer normally non-tacky adhesive layer having'a relatively low melting point, each of said layers comprising gutta percha and pine tar or its described equivalent, and the inner layer also comprising a pigment.

4. An adhesive fabric consisting of a cloth having an adheringlayer of adhesive normally axon-tacky material, and a superimposed'layer of normally non-tacky adhes1ve material having a' lower melting point than the material of the first mentioned 7 layer, so that it may be softened and rendered tacky byheat without materially softoning the, first *inentioned material.

5. An adhesive fabric consisting of a cloth having on one face two superimposed adhering layers of normally non-tacky adhesive material capable of being made tac by the application of heat, the inner layer a so com-- prising a substance for raising its melting point, whereby the application of heat to the outer layer does not materially soften the .ner layer.

6. The herein 'described process of making 'adhesive fabric, which consists in applying .to said fabric asoft or plastic inner layer of adhesive material havinga relatively high melting point, permitting the same to set,

and subsequently superimposing on sald inner layer an outer. layer of normally nontacky adhesive material having a relatively low melting point.

7. The herein described process of making adhesive fabrics, whichjconsists in applying to a fabric aheated mixture comprlsmg gutta'percha and a, material for raising the melting point of said mixture, permitting the layer thus formed to set, and then superimposing on said layer an outer layer comprising gutta percha, said outer layer having a lower melting point than said inner layer.

8. The herein described process of making adhesive fabrics, which consists in applying gutta percha,'tar or its described equivalent and a pigment, permitting the layer thus formed to set, and then superimposing on said layer an outer layer of gutta-percha and said tar or its described equivalent. 9. The herein described process of making adhesive fabrics, which consists in applying to a fabric a heated mixture comprising gutta percha, tar or its described'equivalent and a pigment, permitting the layer thus formed to set, then superimposing on said layer a series of coats of said gutta percha and said tar or its described equivale11t,'per- .to a fabric -a heated mixture comprising mitting each coat to harden before the next coat is applied.

g-In test1mony whereof I have afiixed my signature, in: presence of two witnesses.

" FREDERICK J. GLEASON.

Witnesses:

ALVI T. BALDWIN,

'NnLLm C. OBRI N. 

